#!/bin/bash

#计算1+b赋值给变量a
let a=1+6

# 计算变量a-1赋值给变量b
let b=a-1

# 计算变量a+b赋值给变量c
let c=a+b

# 打印变量a、b、 c
echo "a=${a}, b=${b}, c=${c}"
